Geofluids / 2019 / Article / Fig 3

Research Article

Experimental Investigation on Propagation Behavior of Hydraulic Fractures in Coal Seam during Refracturing

Figure 3

Preparation of standard specimen: (a) cut coal into a cube; (b) load coal sample into the mould; (c) pour cement; (d) complete standard specimen.
(a)
(b)
(c)
(d)

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